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Wang F, Zhao W, Chen J, Zhou Y. Allelopathic inhibitory effect on the growth of microcystis aeruginosa by improved ultrasonic-cellulase extract of Vallisneria. CHEMOSPHERE 2022; 298:134245. [PMID: 35278451 DOI: 10.1016/j.chemosphere.2022.134245] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 02/16/2022] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
The unique and efficient characteristics of allelopathy in submerged plants make it an environmentally friendly method to control harmful algal blooms. Increased research focus has been placed on the improved allelochemical extraction methods of submerged plants because of their cost-utility relationships. In this study, the growth inhibition effect of Vallisneria extract on Microcystis aeruginosa (M. aeruginosa) cells through the combination of enzyme and ultrasonic-assisted extraction method was analyzed. By establishing a co-cultivation experiment, the growth indicators, photosynthetic system, and oxidative stress system of M. aeruginosa were determined. The reactive oxygen species (ROS) and superoxide dismutase (SOD) activity, as well as the catalase (CAT) and Malondialdehyde (MDA) levels of algal cells were found to have increased significantly after co-cultivation, which indicated that the Vallisneria ultrasonic-cellulase extract could induce oxidative stress in Microcystis aeruginosa cells. The Vallisneria extract could promote at low concentrations and inhibit at high concentrations on the growth of Microcystis aeruginosa. The effective suppression of growth of algae cells with the extract was observed at 5 g/L (fresh weight). The results showed that the Vallisneria ultrasonic-cellulase extract had a significant inhibitory effect on M. aeruginosa, making the effective ingredients a useful reference for algae inhibitors.
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Affiliation(s)
- Fan Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Wenjing Zhao
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Jiaqi Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Yuhang Zhou
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
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Neofotis P, Temple J, Tessmer OL, Bibik J, Norris N, Pollner E, Lucker B, Weraduwage SM, Withrow A, Sears B, Mogos G, Frame M, Hall D, Weissman J, Kramer DM. The induction of pyrenoid synthesis by hyperoxia and its implications for the natural diversity of photosynthetic responses in Chlamydomonas. eLife 2021; 10:67565. [PMID: 34936552 PMCID: PMC8694700 DOI: 10.7554/elife.67565] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 11/13/2021] [Indexed: 12/31/2022] Open
Abstract
In algae, it is well established that the pyrenoid, a component of the carbon-concentrating mechanism (CCM), is essential for efficient photosynthesis at low CO2. However, the signal that triggers the formation of the pyrenoid has remained elusive. Here, we show that, in Chlamydomonas reinhardtii, the pyrenoid is strongly induced by hyperoxia, even at high CO2 or bicarbonate levels. These results suggest that the pyrenoid can be induced by a common product of photosynthesis specific to low CO2 or hyperoxia. Consistent with this view, the photorespiratory by-product, H2O2, induced the pyrenoid, suggesting that it acts as a signal. Finally, we show evidence for linkages between genetic variations in hyperoxia tolerance, H2O2 signaling, and pyrenoid morphologies.
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Affiliation(s)
- Peter Neofotis
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Joshua Temple
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States.,Department of Plant Biology, Michigan State University, East Lansing, United States
| | - Oliver L Tessmer
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Jacob Bibik
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Nicole Norris
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Eric Pollner
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Ben Lucker
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Sarathi M Weraduwage
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States.,Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, United States
| | - Alecia Withrow
- Center for Advanced Microscopy, Michigan State University, East Lansing, United States
| | - Barbara Sears
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Greg Mogos
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Melinda Frame
- Center for Advanced Microscopy, Michigan State University, East Lansing, United States
| | - David Hall
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
| | - Joseph Weissman
- Corporate Strategic Research, ExxonMobil, Annandale, United States
| | - David M Kramer
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, United States
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